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Quick Guide

 

-DC9278K 

 

 

                           

 

 

 

 

 

 

 

 

 

 

 
 

 

 

Connect to micro USB port of OTG device 

 
 

 

 

 

3

 

*

 

Before you use scanner, please switch to "C" for battery 
charge for 3~4 hours. 

*

 

Under “C mode”, you can raise/lower soft-keyboard 
easily. (For USB HID only)

4

 

 

DC9278K is with Li-Ion battery inside. When in charging, 
please  use  the  original  power  adaptor  of  OTG  device 
(recommend). Through it, it charges both OTG device and 
DC9278K internal battery at the same time. When in low 
battery (Red LED flashing), please charge it immediately. 

 

LED Indicator Information 

Green LED OFF 

Full charged (Charge mode) 

Green LED ON 

Charging (Charge mode) 

Red LED Flashing 

Low battery (Operation mode)

Attention: Under “Operation mode” please do not charging, 
otherwise the OTG device's battery will be charging back to 
DC9278K’s battery. 

 

 

5

 

 

 

The touch sensor area is around the central area. There are 2 
button trigger on the right and left side. 
Please check the above drawing for your reference. 

 

 

 

 

Installation 

Before using scanner, please make sure that the OTG device is 
fully charged. 
1.

 

Under USB HID interface 
** When plugged into OTG device, it will be recognized and 
begin to scan the barcode.  
 

2.

 

Under USB Serial interface 
** Please install PL-2303 driver into your OTG device first. 
PL-2303 driver can be downloaded from Google Play 
** Connect scanner to your OTG device, then, you can 
know which serial port scanner connects to.  
** The data you scan will be sent to serial port and your 
APP can get the data from serial port directly.

 

Li- Ion Battery 

Button

 Trigger

O=Operation mode

C=Charge mode

Touch Trigger Area

Button Trigger 

Charge port

Indicator 

(LED) 

Indicator (LED)

Suction Cup

Exit Window

PU Glue

(Can be used 

repeatedly) 

Micro USB 

cable (OTG) 

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